In his first-ever interview, the sole Australian survivor of the Waco siege has revealed to 60 Minutes what really took place during the 51-day stand-off, and why he believes crazed cult leader David Koresh will one day return to Earth as the son of God.

Gita: More heavy rain on the way as storm lashes New Zealand

New Zealand's south island is expected to receive a barrage of heavy rain early next week as a spate of wild weather continues to affect the country in the wake of former Cyclone Gita.

Weather forecasts for the coming days show that rainfall linked to the storm over much of New Zealand's south island is expected to ease over the weekend, until Sunday night and into Monday, when a downpour is likely.

Cities stretching from Te Anau and Queenstown to Whataroa and Greymouth are forecast to receive bewteen 60 and 100mm of rain on each of the two days before it dissipates on Tuesday morning and moves across the Pacific Ocean.

A spate of heavy rainfall is expected to hit New Zealand's south island on Sunday (left) and Monday (Right) (Weatherzone).

The rain will come after emergency services in New Zealand have been flat out with over a 1000 call-outs across the country after former Cyclone Gita flooded homes and knocked down power lines.

Power was cut to thousands of homes overnight and major highways were closed in parts of the North and South Islands as the storm made landfall.

Up to 40 Chinese tourists were stranded on buses in Whataroa, on the South Island, after the storms shut down State Highway 6, 1NewsNZ reports.

The Kaituna River inundated on the North Island.

The tourists reportedly used the facilities at Whataroa Community Hall during the night.